Cognomen Яздани (Yazdani 
, Яздани 
, Jazdani 
) , worldwide, is a common surname. The cognomen Яздани is characteristic of Iran, where it is quite a rare surname, United Arab Emirates, and Qatar. Measured by absolute frequency, it is the most numerous in Southern Asia, particularly Iran, Pakistan, and Bangladesh. Very seldom, Яздани is the forename as well as the last name.